I bought my 2011 LML LTZ back in June. When i bought the truck it only had 19k miles and curently has 36k.I have the identical truck to my dad and i figured i needed to stick out . It was all stock when i purchased it, but not for long. The truck now has a MBRP 5 inch straight pipe fitted with a Diamond Eye downpipe. Also it has a S&B cold air intake system. I went with a H&S Mini Maxx and deleted the EGR/DPF/Urea systems.Also the truck has a Alligator Performance LML Turbo Resonator delete and a 3" drivers side intercooler tube. Visually the truck is leveled 2.5 inches on a Ready Lift Leveling kit and sitting on XD Cranks with a 0 offset. The rims are wrapped in 285/65/18 Nitto Trail Grapplers. Along with the rims and tires i have recently added all smoked Recon lights including cab lights, head lights, tail lights, and brake lights.The truck also has 15% tint and carbon fibered Chevy Bowties. On the horizon is a Air dog 165, RoadArmor matching bumpers  and a built transmisson. I use the truck as my daily driver as well as using it to tow excavators,and trailers for my family's landscape business. I was skeptical to go with the LML after giving up my LBZ but Im very happy with the truck so far, it runs strong and has proven itself.